Add hadoop summit meetup and kijicon

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1491833 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8664 Small fix ups for memory size outputs in UI

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1491902 13f79535-47bb-0310-9956-ffa450edef68